/*
 * Copyright (C) 2008-2012 TrinityCore <http://www.trinitycore.org/>
 * Copyright (C) 2005-2009 MaNGOS <http://getmangos.com/>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2 of the License, or (at your
 * option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program. If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef TRINITY_MAIL_H
#define TRINITY_MAIL_H

#include "Common.h"
#include "ObjectGuid.h"

struct AuctionEntry;
class BlackMarketEntry;
struct CalendarEvent;
class Item;
class Object;
class Player;

#define MAIL_BODY_ITEM_TEMPLATE 8383                        // - plain letter, A Dusty Unsent Letter: 889
#define MAX_MAIL_ITEMS 12

enum MailMessageType
{
    MAIL_NORMAL         = 0,
    MAIL_AUCTION        = 2,
    MAIL_CREATURE       = 3,                                // client send CMSG_QUERY_CREATURE on this mailmessagetype
    MAIL_GAMEOBJECT     = 4,                                // client send CMSG_QUERY_GAME_OBJECT on this mailmessagetype
    MAIL_ITEM           = 5,                                // client send CMSG_ITEM_QUERY on this mailmessagetype
    MAIL_BLACKMARKET    = 6,
    MAIL_CALENDAR       = 7
};

enum MailCheckMask
{
    MAIL_CHECK_MASK_NONE        = 0x00,
    MAIL_CHECK_MASK_READ        = 0x01,
    MAIL_CHECK_MASK_RETURNED    = 0x02,                     /// This mail was returned. Do not allow returning mail back again.
    MAIL_CHECK_MASK_COPIED      = 0x04,                     /// This mail was copied. Do not allow making a copy of items in mail.
    MAIL_CHECK_MASK_COD_PAYMENT = 0x08,
    MAIL_CHECK_MASK_HAS_BODY    = 0x10,                     /// This mail has body text.
};

// gathered from Stationery.dbc
enum MailStationery
{
    MAIL_STATIONERY_TEST    = 1,
    MAIL_STATIONERY_DEFAULT = 41,
    MAIL_STATIONERY_GM      = 61,
    MAIL_STATIONERY_AUCTION = 62,
    MAIL_STATIONERY_VAL     = 64,                           // Valentine
    MAIL_STATIONERY_CHR     = 65,                           // Christmas
    MAIL_STATIONERY_ORP     = 67,                           // Orphan
};

enum MailState
{
    MAIL_STATE_UNCHANGED = 1,
    MAIL_STATE_CHANGED   = 2,
    MAIL_STATE_DELETED   = 3
};

enum MailShowFlags
{
    MAIL_SHOW_UNK0    = 0x0001,
    MAIL_SHOW_DELETE  = 0x0002,                             // forced show delete button instead return button
    MAIL_SHOW_AUCTION = 0x0004,                             // from old comment
    MAIL_SHOW_UNK2    = 0x0008,                             // unknown, COD will be shown even without that flag
    MAIL_SHOW_RETURN  = 0x0010,
};

class TC_GAME_API MailSender
{
    public:                                                 // Constructors
        MailSender(MailMessageType messageType, ObjectGuid::LowType const& sender_guidlow_or_entry, MailStationery stationery = MAIL_STATIONERY_DEFAULT);
        MailSender(Object* sender, MailStationery stationery = MAIL_STATIONERY_DEFAULT);
        MailSender(AuctionEntry* sender);
        MailSender(BlackMarketEntry* sender);
        MailSender(CalendarEvent* sender);
        MailSender(Player* sender);

        MailMessageType GetMailMessageType() const { return m_messageType; }
        ObjectGuid::LowType GetSenderId() const { return m_senderId; }
        MailStationery GetStationery() const { return m_stationery; }
    private:
        MailMessageType m_messageType;
        ObjectGuid::LowType m_senderId;                                  // player low guid or other object entry
        MailStationery m_stationery;
};

class TC_GAME_API MailReceiver
{
    public:                                                 // Constructors
        explicit MailReceiver(ObjectGuid::LowType const& receiver_lowguid) : m_receiver(nullptr), m_receiver_lowguid(receiver_lowguid) {}
        MailReceiver(Player* receiver);
        MailReceiver(Player* receiver, ObjectGuid::LowType const& receiver_lowguid);

        Player* GetPlayer() const { return m_receiver; }
        ObjectGuid::LowType  GetPlayerGUIDLow() const { return m_receiver_lowguid; }
    private:
        Player* m_receiver;
        ObjectGuid::LowType  m_receiver_lowguid;
};

class TC_GAME_API MailDraft
{
    typedef std::map<ObjectGuid::LowType, Item*> MailItemMap;

    public:                                                 // Constructors
        explicit MailDraft(uint16 mailTemplateId, bool need_items = true);

        MailDraft(std::string subject, std::string body);

        uint16 GetMailTemplateId() const { return m_mailTemplateId; }
        std::string const& GetSubject() const { return m_subject; }
        uint64 GetMoney() const { return m_money; }
        uint64 GetCOD() const { return m_COD; }
        std::string const& GetBody() const { return m_body; }


        MailDraft& AddItem(Item* item);
        MailDraft& AddMoney(uint64 money) { m_money = money; return *this; }
        MailDraft& AddCOD(uint64 COD) { m_COD = COD; return *this; }
        MailDraft& AddSubject(std::string subject) { m_subject = subject; return *this; }
        MailDraft& AddBody(std::string body) { m_body = body; return *this; }

        void SendReturnToSender(uint32 sender_acc, ObjectGuid::LowType sender_guid, ObjectGuid::LowType receiver_guid, CharacterDatabaseTransaction& trans);
        void SendMailTo(CharacterDatabaseTransaction& trans, MailReceiver const& receiver, MailSender const& sender, MailCheckMask checked = MAIL_CHECK_MASK_NONE, uint32 deliver_delay = 0);

    private:
        void deleteIncludedItems(CharacterDatabaseTransaction& trans, bool inDB = false);
        void prepareItems(Player* receiver, CharacterDatabaseTransaction& trans);                // called from SendMailTo for generate mailTemplateBase items

        uint16      m_mailTemplateId;
        bool        m_mailTemplateItemsNeed;
        std::string m_subject;
        std::string m_body;

        MailItemMap m_items;                                // Keep the items in a map to avoid duplicate guids (which can happen), store only low part of guid

        uint64 m_money;
        uint64 m_COD;
};

struct MailItemInfo
{
    ObjectGuid::LowType item_guid;
    uint32 item_template;
};
typedef std::vector<MailItemInfo> MailItemInfoVec;

struct Mail
{
    uint32 messageID;
    uint8 messageType;
    uint8 stationery;
    uint16 mailTemplateId;
    ObjectGuid::LowType sender;  // TODO: change to uint64 and store full guids
    ObjectGuid::LowType receiver;
    std::string subject;
    std::string body;
    std::vector<MailItemInfo> items;
    std::vector<ObjectGuid::LowType> removedItems;
    time_t expire_time;
    time_t deliver_time;
    uint64 money;
    uint64 COD;
    uint32 checked;
    MailState state;

    void AddItem(ObjectGuid::LowType itemGuidLow, uint32 item_template);
    bool RemoveItem(ObjectGuid::LowType item_guid);
    bool HasItems() const;
};

#endif
